how to get perfect square root of a number in java program code example

Example 1: square root of a number in java without sqrt

Scanner in=new Scanner(System.in);
int num=in.nextInt();
Systen.out.println(Math.pow(num,0.5));

Example 2: square root of a number in java

Scanner in=new Scanner(System.in);
int num=in.nextInt();
System.out.println(Math.sqrt(num)); // the sqrt function gives a value in 'double' data type.